,Copyright © 2020 by McGraw Hill LLC. All rights reserved. Except as permitted under the United
States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any
form or by any means, or stored in a database or retrieval system, without the prior written
permission of the publisher, with the exception that the program listings may be entered, stored,
and executed in a computer system, but they may not be reproduced for publication.
ISBN: 978-1-26-044171-0
MHID: 1-26-044171-7
The material in this eBook also appears in the print version of this title: ISBN: 978-1-26-044170-
3, MHID: 1-26-044170-9.
eBook conversion by codeMantra
Version 1.0
All trademarks are trademarks of their respective owners. Rather than put a trademark symbol after
every occurrence of a trademarked name, we use names in an editorial fashion only, and to the
benefit of the trademark owner, with no intention of infringement of the trademark. Where such
designations appear in this book, they have been printed with initial caps.
McGraw-Hill Education eBooks are available at special quantity discounts to use as premiums and
sales promotions or for use in corporate training programs. To contact a representative, please visit
the Contact Us page at www.mhprofessional.com.
Information has been obtained by McGraw Hill LLC from sources believed to be reliable.
However, because of the possibility of human or mechanical error by our sources, McGraw Hill
LLC, or others, McGraw Hill LLC does not guarantee the accuracy, adequacy, or completeness of
any information and is not responsible for any errors or omissions or the results obtained from the
use of such information.
TERMS OF USE
This is a copyrighted work and McGraw-Hill Education and its licensors reserve all rights in and
to the work. Use of this work is subject to these terms. Except as permitted under the Copyright
Act of 1976 and the right to store and retrieve one copy of the work, you may not decompile,
disassemble, reverse engineer, reproduce, modify, create derivative works based upon, transmit,
distribute, disseminate, sell, publish or sublicense the work or any part of it without McGraw-Hill
Education’s prior consent. You may use the work for your own noncommercial and personal use;
any other use of the work is strictly prohibited. Your right to use the work may be terminated if
you fail to comply with these terms.
THE WORK IS PROVIDED “AS IS.” McGRAW-HILL EDUCATION AND ITS LICENSORS
MAKE NO GUARANTEES OR WARRANTIES AS TO THE ACCURACY, ADEQUACY OR
COMPLETENESS OF OR RESULTS TO BE OBTAINED FROM USING THE WORK,
INCLUDING ANY INFORMATION THAT CAN BE ACCESSED THROUGH THE WORK
VIA HYPERLINK OR OTHERWISE, AND EXPRESSLY DISCLAIM ANY WARRANTY,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. McGraw-Hill
,Education and its licensors do not warrant or guarantee that the functions contained in the work
will meet your requirements or that its operation will be uninterrupted or error free. Neither
McGraw-Hill Education nor its licensors shall be liable to you or anyone else for any inaccuracy,
error or omission, regardless of cause, in the work or for any damages resulting therefrom.
McGraw-Hill Education has no responsibility for the content of any information accessed through
the work. Under no circumstances shall McGraw-Hill Education and/or its licensors be liable for
any indirect, incidental, special, punitive, consequential or similar damages that result from the
use of or inability to use the work, even if any of them has been advised of the possibility of such
damages. This limitation of liability shall apply to any claim or cause whatsoever whether such
claim or cause arises in contract, tort or otherwise.
About the Author
Wale Soyinka is a system administrator, a DevOps/SecOps aficionado, an open source evangelist,
and hacker.
He is also the author of several Linux, network, and Windows administration books,
including Linux Administration: A Beginner’s Guide, Wireless Network Administration: A
Beginner’s Guide, and Advanced Linux Administration.
When he is not marveling at his own culinary creations, Wale participates in discussions, projects,
and ventures, usually focused on promoting and showcasing open source technologies and culture.
ABOUT THE CONTRIBUTOR
Buki Adeniji is an AWS cloud infrastructure consultant and seasoned telephony and telecomms
professional who is extremely passionate about cloud computing, Linux, VoIP, and Asterisk, and
has many global deployments under his belt. Buki has experience building and managing high-
availability carrier-grade VoIP platforms and production infrastructure. He has led global teams
that managed mission-critical cloud-based services, achieving 99.99 percent (“four nines”) service
availability. Being a lifetime learner with advanced degrees in Telecomms, Business, and Project
Management, as well as a number of AWS certifications, Buki’s goal is to continue to excel at the
boundaries of technology and innovation by using principles of ethnography and design thinking
to develop technical solutions that address current and next-generation business needs. Above all,
he is passionate about converting complex concepts and procedures into simple, concise, and
executable steps. Buki currently resides in the Bay Area, where he is a passionate family man, as
well as an active maker who participates in building and racing DIY self-driving model cars.
ABOUT THE TECHNICAL EDITOR
David Lane is a DevOps/SRE manager with 30 years of experience in open source solutions
development and implementation for the government, corporations, and associations. He
discovered Linux via the initial Slackware distribution in the late 1990s and has never looked back.
Today, David helps companies transition to DevOps methodologies from traditional software
development practices with open source tooling. When he is not helping companies, he is an
amateur radio operator and emergency coordinator for ARES, where he espouses open source
solutions for Software Defined Radio (SDR) and other methods of communication during a
communications emergency.
, Contents at a Glance
Part I Introduction and Installation
1 Introduction to Linux, Distributions, and FOSS
2 Installing a Linux Server
3 Deploying Linux Servers in the Cloud
Part II Single-Host Administration
4 The Command Line
5 Managing Software
6 Managing Users and Groups
7 Booting and Shutting Down
8 File Systems
9 Core System Services
10 The Linux Kernel
11 Knobs and Dials: API (Virtual) File Systems
Part III Networking and Security
12 TCP/IP for System Administrators
13 Network Configuration
14 Linux Firewall (Netfilter)
15 Local Security
16 Network Security
Part IV Internet Services
17 Domain Name System (DNS)
18 File Transfer Protocol (FTP)
19 Apache Web Server
20 Simple Mail Transfer Protocol (SMTP)
21 Post Office Protocol and Internet Mail Access Protocol (POP and IMAP)
22 Voice over Internet Protocol (VoIP)
23 Secure Shell (SSH)
Part V Intranet Services
24 Network File System (NFS)
25 Samba
26 Distributed File Systems (DFS)
27 Lightweight Directory Access Protocol (LDAP)
28 Printing
29 Dynamic Host Configuration Protocol (DHCP)
30 Virtualization
States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any
form or by any means, or stored in a database or retrieval system, without the prior written
permission of the publisher, with the exception that the program listings may be entered, stored,
and executed in a computer system, but they may not be reproduced for publication.
ISBN: 978-1-26-044171-0
MHID: 1-26-044171-7
The material in this eBook also appears in the print version of this title: ISBN: 978-1-26-044170-
3, MHID: 1-26-044170-9.
eBook conversion by codeMantra
Version 1.0
All trademarks are trademarks of their respective owners. Rather than put a trademark symbol after
every occurrence of a trademarked name, we use names in an editorial fashion only, and to the
benefit of the trademark owner, with no intention of infringement of the trademark. Where such
designations appear in this book, they have been printed with initial caps.
McGraw-Hill Education eBooks are available at special quantity discounts to use as premiums and
sales promotions or for use in corporate training programs. To contact a representative, please visit
the Contact Us page at www.mhprofessional.com.
Information has been obtained by McGraw Hill LLC from sources believed to be reliable.
However, because of the possibility of human or mechanical error by our sources, McGraw Hill
LLC, or others, McGraw Hill LLC does not guarantee the accuracy, adequacy, or completeness of
any information and is not responsible for any errors or omissions or the results obtained from the
use of such information.
TERMS OF USE
This is a copyrighted work and McGraw-Hill Education and its licensors reserve all rights in and
to the work. Use of this work is subject to these terms. Except as permitted under the Copyright
Act of 1976 and the right to store and retrieve one copy of the work, you may not decompile,
disassemble, reverse engineer, reproduce, modify, create derivative works based upon, transmit,
distribute, disseminate, sell, publish or sublicense the work or any part of it without McGraw-Hill
Education’s prior consent. You may use the work for your own noncommercial and personal use;
any other use of the work is strictly prohibited. Your right to use the work may be terminated if
you fail to comply with these terms.
THE WORK IS PROVIDED “AS IS.” McGRAW-HILL EDUCATION AND ITS LICENSORS
MAKE NO GUARANTEES OR WARRANTIES AS TO THE ACCURACY, ADEQUACY OR
COMPLETENESS OF OR RESULTS TO BE OBTAINED FROM USING THE WORK,
INCLUDING ANY INFORMATION THAT CAN BE ACCESSED THROUGH THE WORK
VIA HYPERLINK OR OTHERWISE, AND EXPRESSLY DISCLAIM ANY WARRANTY,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. McGraw-Hill
,Education and its licensors do not warrant or guarantee that the functions contained in the work
will meet your requirements or that its operation will be uninterrupted or error free. Neither
McGraw-Hill Education nor its licensors shall be liable to you or anyone else for any inaccuracy,
error or omission, regardless of cause, in the work or for any damages resulting therefrom.
McGraw-Hill Education has no responsibility for the content of any information accessed through
the work. Under no circumstances shall McGraw-Hill Education and/or its licensors be liable for
any indirect, incidental, special, punitive, consequential or similar damages that result from the
use of or inability to use the work, even if any of them has been advised of the possibility of such
damages. This limitation of liability shall apply to any claim or cause whatsoever whether such
claim or cause arises in contract, tort or otherwise.
About the Author
Wale Soyinka is a system administrator, a DevOps/SecOps aficionado, an open source evangelist,
and hacker.
He is also the author of several Linux, network, and Windows administration books,
including Linux Administration: A Beginner’s Guide, Wireless Network Administration: A
Beginner’s Guide, and Advanced Linux Administration.
When he is not marveling at his own culinary creations, Wale participates in discussions, projects,
and ventures, usually focused on promoting and showcasing open source technologies and culture.
ABOUT THE CONTRIBUTOR
Buki Adeniji is an AWS cloud infrastructure consultant and seasoned telephony and telecomms
professional who is extremely passionate about cloud computing, Linux, VoIP, and Asterisk, and
has many global deployments under his belt. Buki has experience building and managing high-
availability carrier-grade VoIP platforms and production infrastructure. He has led global teams
that managed mission-critical cloud-based services, achieving 99.99 percent (“four nines”) service
availability. Being a lifetime learner with advanced degrees in Telecomms, Business, and Project
Management, as well as a number of AWS certifications, Buki’s goal is to continue to excel at the
boundaries of technology and innovation by using principles of ethnography and design thinking
to develop technical solutions that address current and next-generation business needs. Above all,
he is passionate about converting complex concepts and procedures into simple, concise, and
executable steps. Buki currently resides in the Bay Area, where he is a passionate family man, as
well as an active maker who participates in building and racing DIY self-driving model cars.
ABOUT THE TECHNICAL EDITOR
David Lane is a DevOps/SRE manager with 30 years of experience in open source solutions
development and implementation for the government, corporations, and associations. He
discovered Linux via the initial Slackware distribution in the late 1990s and has never looked back.
Today, David helps companies transition to DevOps methodologies from traditional software
development practices with open source tooling. When he is not helping companies, he is an
amateur radio operator and emergency coordinator for ARES, where he espouses open source
solutions for Software Defined Radio (SDR) and other methods of communication during a
communications emergency.
, Contents at a Glance
Part I Introduction and Installation
1 Introduction to Linux, Distributions, and FOSS
2 Installing a Linux Server
3 Deploying Linux Servers in the Cloud
Part II Single-Host Administration
4 The Command Line
5 Managing Software
6 Managing Users and Groups
7 Booting and Shutting Down
8 File Systems
9 Core System Services
10 The Linux Kernel
11 Knobs and Dials: API (Virtual) File Systems
Part III Networking and Security
12 TCP/IP for System Administrators
13 Network Configuration
14 Linux Firewall (Netfilter)
15 Local Security
16 Network Security
Part IV Internet Services
17 Domain Name System (DNS)
18 File Transfer Protocol (FTP)
19 Apache Web Server
20 Simple Mail Transfer Protocol (SMTP)
21 Post Office Protocol and Internet Mail Access Protocol (POP and IMAP)
22 Voice over Internet Protocol (VoIP)
23 Secure Shell (SSH)
Part V Intranet Services
24 Network File System (NFS)
25 Samba
26 Distributed File Systems (DFS)
27 Lightweight Directory Access Protocol (LDAP)
28 Printing
29 Dynamic Host Configuration Protocol (DHCP)
30 Virtualization
